prep1-45

yaomb

45.   The application of a new method for analyzing the chemistry of tooth enamel allows scientists to examine molars of prehuman ancestors and determining that their diets were more varied than had been supposed.

(A) The application of a new method for analyzing the chemistry of tooth enamel allows scientists to examine molars of prehuman ancestors and determining

(B) Through the application of a new method for analyzing the chemistry of tooth enamel, the molars of prehuman ancestors were examined by scientists who determined

(C) When they applied a new method for analyzing the chemistry of tooth enamel, scientists examined molars of prehuman ancestors, determining

(D) Applying a new method for analyzing the chemistry of tooth enamel, the molars of prehuman ancestors have been examined by scientists, who determined

(E) Applying a new method for analyzing the chemistry of tooth enamel, scientists have examined molars of prehuman ancestors and determined

答案选E，可是我想问，原文未画线的部分，明明是过去时和过去完成时呀，可E中出现的是现在完成时，也许我对这个时态有点搞不清楚，这样也行吗？C为是什么不行呢？

kingwangfei

C中有they their的指代不一致的问题

yaomb

那E中的这个时态呢？

yaomb

顶起来，还是不明白呀~~

vivian0331

你要是不提时态的问题，我都没注意。E的现在完成时没有问题吧，后面的过去时（过去人的饮食，也没有问题），过去完成被动时（过去被猜测的）。只有E是平行结构、逻辑主语最完美的，所以，如果不是追求完美，这个答案是最好的吧。

AlienX

C的they的指代還好, 問題在於when, 原句沒有這個意思...

yaomb

我还是觉得，若按未画线的走，全文应该用过去时呀~~

时态的错误，应该比逻辑的意思更严重吧，而且C的逻辑也不是特别明显的有什么不对呀~~

open to discuss~~

lijiahui0422

(C) When they applied a new method for analyzing the chemistry of tooth enamel, scientists examined molars of prehuman ancestors, determining

AlienX 说的没错when是个很大的问题，强加了关系

另外，既然主句和分句的主语相同，完全可以用也应该用分词的形式表达，不然多罗嗦啊

最后determine和examine是并列更好一些

红尘道士

(E) Applying a new method for analyzing the chemistry of tooth enamel, scientists have examined molars of prehuman ancestors and determined
答案E中，现在完成时怎么和过去式并列？
我感觉答案应该是
(E) Applying a new method for analyzing the chemistry of tooth enamel, scientists  examined molars of prehuman ancestors and determined

selinalover

不同时态的动词是可以并列的 就如同现在分词和过去分词也是可以并列的一样